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Turn the heat up – A first look at MESSENGER's near-infrared spectra of Mercury using new high-temperature emissivity measurements

Helbert, J. und Maturilli, A. und D'Amore, M. und Sprague, A.L. und Gillis-Davis, J.J. und Izenberg, N.R. und McClintock, W.E. und Solomon, S.C. (2008) Turn the heat up – A first look at MESSENGER's near-infrared spectra of Mercury using new high-temperature emissivity measurements. In: Eos Trans. AGU, Fall Meet. Suppl., 89 (53), . AGU Fall meeting, 2008-12-14 - 2008-12-19, San Francisco, California (USA).

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Kurzfassung

Analyzing the surface composition of Mercury's regolith from remote-sensing measurements is a challenging task. In support of the National Aeronautics and Space Agency's MErcury Surface, Space ENvironment, GEochemistry and Ranging (MESSENGER) mission and especially in preparation for the Mercury Radiometer and Thermal Infrared Spectrometer (MERTIS) instrument on the BepiColombo mission of the European Space Agency and the Japan Aerospace Exploration Agency, we are developing a Planetary Emissivity Laboratory (PEL) at Deutsches Zentrum für Luft- und Rahmfahrt (DLR) in Berlin. The PEL allows measurement of the emissivity of Mercury-analogue materials at grain sizes smaller than 25 μm and at temperatures of more than 400°C, typical for Mercury's low-latitude dayside. The PEL development follows a multi-step approach. We have already obtained emissivity data at mid-infrared wavelengths that show significant changes in spectral behavior with temperature indicative of changes in the crystal structure of the samples. We are currently installing a new calibration target that will allow the acquisition of emissivity data over the full wavelength range from 1 to 50 micrometer with good signal-to-noise ratio. Here we present initial data in the range 1 to 1.4 micrometer, the near-infrared wavelength coverage of the Mercury Atmospheric and Surface Composition Spectrometer (MASCS) instrument on MESSENGER. Even these early PEL measurements have important implications for the analysis of the spectral observations obtained during MESSENGER's first Mercury flyby on 14 January 2008 as well as the data to be obtained during the probe's second Mercury flyby on 6 October.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Turn the heat up – A first look at MESSENGER's near-infrared spectra of Mercury using new high-temperature emissivity measurements
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Helbert, J.NICHT SPEZIFIZIERT
Maturilli, A.NICHT SPEZIFIZIERT
D'Amore, M.NICHT SPEZIFIZIERT
Sprague, A.L.Lunar and Planetary Laboratory, University of Arizon, Tuscon, AZ 85721, United States
Gillis-Davis, J.J.Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, United States
Izenberg, N.R. APL, John Hopkins University, Laurel, MD 20723, United States
McClintock, W.E.Laboratory of Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, United States
Solomon, S.C.Department of Terrestrial Magnetism, Carnegie Institute of Washington, Washington, DC 20015, United States
Datum:Dezember 2008
Erschienen in:Eos Trans. AGU, Fall Meet. Suppl.
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Band:89
Seitenbereich:
Status:veröffentlicht
Stichwörter:Planetary mineralogy and petrology, Optical, infrared, and Raman spectroscopy, Mercury, Instruments and techniques
Veranstaltungstitel:AGU Fall meeting
Veranstaltungsort:San Francisco, California (USA)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2008-12-14 - 2008-12-19
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben BepiColombo (alt)
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Planetenforschung > Planetenphysik
Hinterlegt von: Stefanie Hempel
Hinterlegt am:05 Jan 2009
Letzte Änderung:27 Apr 2009 15:39

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